Took it out for a bike ride the first day. It was a warm day and the stryka breathed very well. But that same night when it dropped to mid thirties I stayed warm with just a cotton shirt and the hoody. The hood isn't what you'd expect, but it could double as a ninja costume for Halloween, so obviously it's awesome. Soft, warm, and breathable. I give it a 10. Out of 11. But still.
I got this (black, size medium) for my boyfriend as a Christmas present because until today, he has been totally jeal of my Arc'teryx collection. I intend for it to get used backcountry skiing and light mountaineering. Now I am the one missing out, the interior is brushed and exceptionally soft, comfortable and warm. The exterior face of the fabric is tightly woven and will slide freely under a shell or midlayer; the build quality and fit are top-notch, as can always be expected from this industry-leading company. The scuba hood looks a little strange around the house, but is highly functional under a helmet on the mountain. The logo is very muted (at least on the black) which I think is super-classy. Recommended for anyone looking for a hooded cold-weather baselayer.